Base units Mass – gram Temperature- ° Celsius Time –seconds, minutes Length – meter Area – meters 2 Volume – meters 3, liter

Warm up/practice 78 g = __________ mg 25 g = __________kg 578cm = _________m 456 m = __________km 500 mL = ________L

What characteristics do most scientists share? Why is measurement important in science?

Warm up What is “scientific inquiry?”

Myth busters {They provide an example of doing science.} They choose a myth Background information Hypothesis Design test, observe, collect data share

Warm up When do you use scientific inquiry in your life? (Outside of science class)

experiment Orange – 27°C, vita water Purple - 17°C, cranrasberry Water - 22°C, water Hypothesis – cranrasberry will have the most “food” for the yeast – yeast disappears, most inflated balloon

design Does temperature affect yeast behavior? Hot – 85°C Warm - 27°C Cold – 16 ° 150 mL water 10 mL sugar 15 mL yeast

Design HR 227 Hypothesis is warm with lots of sugar will show the most yeast growth. 65°C, 150 mL water, 9 mL of yeast, 1 spoon of sugar 65°C, 150 mL water, 9 mL of yeast, 2 spoons of sugar 65°C, 150 mL water, 9 mL of yeast, 4 spoons of sugar

Hr Design Which sweetener will yeast grow best in? 150 mL water, 10 mL yeast, nothing 150 mL water, 10 mL yeast, sugar 150 mL water, 10 mL yeast, sweet’n low All at 30°C

Design HR229 Hypothesis - Krazy Kiwi will rise the most 150 mL krazy Kiwi, 5mL yeast 150 mL water, heaping spoon of sugar, 5mL yeast 150 mL water, 5mL yeast Unknown temperatures

Design Testing hypothesis – yeast grows best with greatest amount of sugar Control – 1)all the things held constant 2)compare against Variable – thing you are testing CONTROLS: amt. of liquid, amt., of yeast, VARIABLE: TYPE OF SWEETNESS

Scientific Inquiry/Scientific Method/ Problem Solving Identify a problem – What are the best conditions for yeast growth? Gather data State a hypothesis Test the hypothesis Draw conclusions Report results

Warm up? What scientific and technological advances have occurred since you were born?

Sunscreen experiment What were the controls? What was the variable? Why did we have one sample without sunscreen?

Possible graph

Possible bar graph

Mass Grams, kg Measure the amount of matter an object has Different from weight which is attraction of the gravity on an object

volume Liters, mL or cm 3 The amount of space an object occupies 1 L of water 5 mL of medicine

Observation – info that can be gathered and confirmed with the senses. –Example – the coke can is red Inference – a deduction based on observation. Example: the person drinking diet coke must be on a diet. Hypothesis – tentative explanation of an observation that will be tested; an educated guess

Theory – explanation of events/behaviors based on “repeated” testing; withstands the test of time. Law?

Why do scientists need evidence? To prove their theory To not lead people astray So others don’t do dangerous things To come up with new theories So others can build on your work To fund new projects

test Scientific method (3) Multiple choice (15) Measure line (5) Rank distances (5) Calculate the volume (1) Open response (choose 1)

How many drops of water fit on the “head” of a penny”? Background info – Hypothesis? Data?

practice Find the length, width, area, & perimeter of note card in cm & mm

Sample Design an experiment to find out what color surface heats up fastest in the Sun.